4.7 Packet Exchange for Establishing a Management Session
Figure 9: Client establishing a management session
A client connecting to the server for managing the server is typically not interested in using the functionality of the telephony devices on the server or the event occurring on those devices. Such a client is called an MMC client and uses 0xFFFFFFFD for the lProcessID field of the ClientAttach method. The server does not send any events to such an MMC client – neither RemoteSPAttach nor the mailslot mechanism as described in the ClientAttach method are used.
The client sends the Initialize buffer for line devices as part of establishing a management session. This is required to get a HLINEAPP handle that is used in subsequent requests to the server.